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Operating expenses - Advertising (Details) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Operating expenses |  |  |
Media advertising | $ (769) | $ (527) | $ (524)
Fairs and exhibitions | (264) | (176) | (137)
Other advertising costs | (185) | (171) | (153)
Total advertising | $ (1,218) | $ (874) | $ (814)

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- Definition The amount of expense arising from advertising. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of advertising expense arising from fairs and exhibitions. + References No definition available. + Details
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- Definition The amount of expense arising from media advertising. + References No definition available. + Details
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- Definition The amount of expense arising from other advertising. + References No definition available. + Details
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Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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